It contains ui:composition declaration posted below, xmlns:f should be http://java.sun.com/jsf/core as in Action and Form templates.

<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<ui:composition xmlns="http://www.w3.org/1999/xhtml"
xmlns:s="http://jboss.com/products/seam/taglib"
xmlns:ui="http://java.sun.com/jsf/facelets"

xmlns:f="http://java.sun.com/jsf"

xmlns:h="http://java.sun.com/jsf/html"
xmlns:rich="http://richfaces.ajax4jsf.org/rich"
template="layout/template.xhtml">

Conversation page is failed to load under RHEL Desktop 5 and looks like on attached picture.